High-Frequency Model of the Power Transformer Based on Frequency-Response Measurements

Author

Filipovic-Grcic, Dalibor ; Filipovic-Grcic, Bozidar ; Uglesic, Ivo

Author_Institution

Electr. Eng. Inst., KONCAR, Zagreb, Croatia

Volume

30

Issue

1

fYear

2015

fDate

Feb. 2015

Firstpage

34

Lastpage

42

Abstract

In this paper, a new high-frequency black-box model of the power transformer is presented for the calculation of transferred lightning overvoltages. The model is based on frequency-response analysis measurements and the application of four-terminal network theory. The computational verification of the presented model was successfully performed on a white-box transformer model in Electromagnetic Transients Program-Restructured Version software. The experimental verification was carried out on 130-kVA and 36-MVA three-phase power transformers. The presented calculation and measurement results confirm the validity of the proposed model for full and chopped lightning impulse voltages.

Keywords

EMTP; frequency response; lightning; modelling; overvoltage; power transformers; electromagnetic transients program-restructured version software; four-terminal network theory; frequency-response analysis measurement; high-frequency black-box model; high-frequency transferred lightning overvoltage; lightning impulse voltage; three-phase power transformer; white-box transformer model; Frequency measurement; Lightning; Power transformer insulation; Surges; Voltage measurement; Windings; Fast Fourier transform (FFT); four-terminal network; frequency-response measurements; high-frequency transformer model; transfer function; transferred lightning overvoltages;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2014.2327061

Filename

6839055